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| author | Bin Meng <bmeng.cn@gmail.com> | 2017-09-07 06:13:17 -0700 |
|---|---|---|
| committer | Marek Vasut <marek.vasut+renesas@gmail.com> | 2017-09-27 12:12:21 +0200 |
| commit | 3e59f59015e39ceb870fa8a7a12e0464e775512b (patch) | |
| tree | f03033b5635b7fa5ee51ced115ec7072fb56c82e /drivers | |
| parent | 7489d22a3c73b527c21c147f3547e8cc02484e47 (diff) | |
| download | u-boot-3e59f59015e39ceb870fa8a7a12e0464e775512b.tar.gz u-boot-3e59f59015e39ceb870fa8a7a12e0464e775512b.tar.xz u-boot-3e59f59015e39ceb870fa8a7a12e0464e775512b.zip | |
dm: usb: Add a new USB controller operation 'get_max_xfer_size'
The HCD may have limitation on the maximum bytes to be transferred
in a USB transfer. USB class driver needs to be aware of this.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/usb-uclass.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c index 0b8a501ce8..bc44fc3394 100644 --- a/drivers/usb/host/usb-uclass.c +++ b/drivers/usb/host/usb-uclass.c @@ -150,6 +150,17 @@ int usb_update_hub_device(struct usb_device *udev) return ops->update_hub_device(bus, udev); } +int usb_get_max_xfer_size(struct usb_device *udev, size_t *size) +{ + struct udevice *bus = udev->controller_dev; + struct dm_usb_ops *ops = usb_get_ops(bus); + + if (!ops->get_max_xfer_size) + return -ENOSYS; + + return ops->get_max_xfer_size(bus, size); +} + int usb_stop(void) { struct udevice *bus; |